JPH074172A - Inner space displacement measuring instrument - Google Patents

Abstract

PURPOSE:To accurately measure the displacement of inner space such as a shaft without much labor. CONSTITUTION:The inner wall 3a of a shaft 3 has four such fixed arms 9 as allowing free installation and fixation via installation wedges 12 at the intervals of the prescribed angle A, and direct acting arms 10 are arranged among the fixed arms 9 and connected thereto in such a way as free to turn relative to the arms 9. Also, the arms 10 are fitted with expansion displacement measuring devices 25 to measure and output the expansion amount of the direct acting sections 10a of the arms 10. In addition, turning displacement measurement devices 26 are provided among the arms 10 and 9 for measuring the relative angles thereof. Furthermore, an arithmetic section is provided to compute the relative positions of the fixed arms 9 on the basis of an outputted expansion amount and relative angles, together with a display section to output computed and detected relative positions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner air displacement measuring device suitable for measuring the displacement of an internal space such as a vertical shaft.

[0002]

2. Description of the Related Art When a vertical shaft is excavated and formed, the inner wall of the vertical shaft is displaced by the earth pressure due to the change of the stress relationship due to the earth pressure in the ground, and the inner space of the vertical shaft is displaced. There is. Therefore, it was necessary to periodically measure and monitor the displacement of the inner space of the shaft. Conventionally, the measurement of the displacement of the internal space of a vertical shaft has been performed by a method of measuring the mine diameter using a tape measure or the like.

[0003]

However, in the method of measuring the pit diameter using a tape measure or the like, it takes time and labor for the measurement work, and it is difficult to perform accurate measurement.

Therefore, in view of the above circumstances, an object of the present invention is to provide an inner air displacement measuring instrument which can accurately measure the displacement of the internal space such as a vertical shaft without trouble.

[Means for Solving the Problems] That is, according to the present invention, a predetermined angle pitch (A) is provided on a ground (3a) of a shaft of a vertical shaft (3).
Has a plurality of fixing members (9, 12) that can be installed and fixed by
An elastic member (1) is provided between the plurality of fixing members (9, 12).
0) is connected to the fixed member (9, 12) so as to be rotatable relative to the fixed member (9, 12), and the elastic member (10) is provided with
The expansion / contraction member (10) is provided with expansion / contraction displacement measuring means (25) for measuring and outputting the expansion / contraction amount (B).
And the fixing members (9, 12) between the elastic members (1
0) and the fixing member (9, 12) are provided with an angle measuring means (26) for measuring a relative angle (C), and the expansion / contraction amount (B) output from the expansion / contraction displacement measuring means (25) and the angle measurement. Based on the relative angle (C) output from the means (26), a calculation unit (19, 21) for calculating the relative position (F) between the plurality of fixing members (9, 12) is provided, and the calculation is performed. An output part (17) for outputting a relative position (F) between the plurality of fixing members (9, 12) calculated and detected by the parts (19, 21) is provided. The numbers in parentheses () indicate the corresponding elements in the drawings for convenience, and therefore the present description is not limited to the description in the drawings. The same applies to the following action columns.

[0005]

With the above-described structure, the present invention has a fixing member (9,
Since 12) is fixed to the underground wall (3a) of the shaft (3), the relative position (F) between the fixing members (9, 12) is
It acts so as to be displaced in accordance with the displacement of the ground wall (3a) of the vertical shaft (3).

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a state in which the inner air displacement measuring device according to the present invention is installed in an example of a shaft, and FIG. 2 is a diagram showing a displacement detecting device of the inner air displacement measuring device shown in FIG. Figure 3
3A and 3B are diagrams showing the screen of the display unit shown in FIG.

The excavation site 1 has a ground 2 as shown in FIG.
Has a vertical shaft 3 which is vertically excavated and has a horizontal cross section of a substantially circular shape, and the vertical shaft 3 is in a state in which no support or lining is provided (note that FIG. It is a horizontal sectional view of the shaft 3 in the ground.). In the shaft 3,
An inner-air displacement measuring device 5 according to the present invention is installed, and the inner-air displacement measuring device 5 is composed of a measuring device body 6 shown in FIG. 1 and a displacement detecting device 7 shown in FIG. As shown in FIG. 1, the measuring device main body 6 is installed in the vertical shaft 3, and thus the inner air displacement measuring device 5 is installed in the vertical shaft 3 in the measuring device main body 6. The measuring device main body 6 has four fixed arms 9, and each fixed arm 9 is made of steel and formed into a rod shape having the same length. At the intermediate position in the longitudinal direction of each fixed arm 9, a rod-shaped installation wedge 12 is joined so that the installation wedge 12 and the fixed arm 9 form a T shape, and the tip side of each installation wedge 12 Is a vertical shaft 3
It is driven into the ground 2 which is the inner wall 3a of the above, and is fixed by the ground 2 (the installation wedges 12 can be driven into the ground 2 to be fixed and can be released). That is, the measuring instrument body 6 is installed in the vertical shaft 3 while being fixed to the ground 2 via the installation wedge 12. Further, all the installation wedges 12 driven into the ground 2 are located at the same height (depth) level, and these installation wedges 12 are positioned at a pitch of a predetermined angle A (90 °) with each other. (Thus, each fixed arm 9 is also positioned at an angular pitch of a predetermined angle A with respect to each other). Further, each fixed arm 9 joined to the installation wedge 12 driven into the ground 2 is positioned such that the longitudinal direction thereof coincides with the horizontal direction. Between the four fixed arms 9, the linear motion arms 10 made of steel and formed in a rod shape are connected one by one such that the fixed arms 9 are connected to each other. Since it is horizontal, the linear motion arm 10 that connects the fixed arms 9 and 9 is also horizontal. In addition, each linear motion arm 10 is provided with a cylindrical linear motion portion 10a, and each linear motion arm 10 includes a linear motion portion 1a in each linear motion portion 10a.
It is provided so as to be expandable and contractable in the extension direction of 0, that is, in the directions of arrows B and C in FIG. Further, each connecting portion between the arms 9 and 10 is a rotating portion 11 in a shape in which the arms 9 and 10 are pivotally connected by a pin (not shown) in the vicinity of each end portion. The arms 9 and 10 are relatively rotatable only in the horizontal direction. As described above, the eight arms 9 and 10 described above are connected to each other to form a horizontal octagonal ring body 6a.

By the way, each of the linear motion parts 10a of the four linear motion arms 10 has a built-in expansion / contraction displacement measuring device 25 such as a linear scale, and each linear motion part 10a.
The expansion / contraction amount B of the expansion / contraction amount B is
It is converted into an electric signal by and output to the outside. Further, each expansion / contraction displacement measuring device 25 and a displacement detection device 7 described later are connected by an electric cable (not shown in FIG. 1), and each expansion / contraction displacement measuring device 25 converts them into an electric signal. The amount B of expansion and contraction is
It is adapted to be transmitted to the displacement detecting device 7 side at any time via the electric cable. On the other hand, each of the eight rotary parts 11 has a built-in rotary displacement measuring device 26 such as a rotation angle meter.
The relative angle C between 0 is converted into an electric signal by each rotational displacement measuring device 26. Further, between each rotational displacement measuring device 26 and a displacement detecting device 7 described later,
Relative angles C, which are respectively connected by electric cables (not shown in FIG. 1) and converted into electric signals by the rotational displacement measuring devices 26, are transmitted to the displacement detecting device 7 side at any time via the electric cables. It has become so. The measuring device body 6 of the inner-air displacement measuring device 5 is configured as described above.

Displacement detecting device 7 of inner-air displacement measuring device 5
As described above, the expansion / contraction displacement measuring device 25, the rotational displacement measuring device 26, and the electric cable (not shown in FIG. 1).
Are provided on the ground side outside the shaft 3. As shown in FIG. 2, the displacement detection device 7 includes a main controller 1
3, the main control unit 13 has a keyboard 16 and a display unit 17 having a screen 17a via a bus line 15.
A first calculation unit 19, a data input unit 20, a second calculation unit 21,
A pit wall displacement determination unit 22 is provided. The expansion / contraction displacement measuring device 25 and the rotational displacement measuring device 26 described above are
It is connected to the data input unit 20 of the displacement detection device 7 via an electric cable. Further, the displacement detection device 7 is connected to a speaker 23 installed at a work place (not shown) located at the inner and lower ends of the vertical shaft 3 via an electric cable.

The excavation site 1 and the inner-air displacement measuring device 5 are constructed as described above. To measure the displacement of the inner space of the vertical shaft 3 by using the inner-air displacement measuring device 5, the following procedure is performed. . First, as shown in FIG. 1, the measuring device main body 6 of the inner-air displacement measuring device 5 is set in such a manner that the setting wedges 12 of the four fixing arms 9 are driven and fixed to the inner wall 3a of the vertical shaft 3, respectively.
Each setting wedge 12 is driven in the horizontal direction, so that the ring body 6a of the measuring device body 6 becomes horizontal. Further, the ring body 6a has a substantially regular octagonal shape corresponding to the shape of the vertical shaft 3 having a circular horizontal cross section.
The lengths of the linear motion arms 10 of the book are all equal to the length of the fixed arm 9, and the arms 9 at the rotating parts 11 at eight locations are
The angles formed by 10 are all about 135 °.

Next, on the side of the displacement detecting device 7, the displacement detecting device 7 is started via the keyboard 13. Upon starting, the main control unit 13 of the displacement detection device 7 detects the first time, that is, the mode of the internal space 3b of the shaft 3 in the initial state. By the way, in the four expansion / contraction displacement measuring devices 25 of the measuring device body 6, as described above, the expansion / contraction amount B of each linear motion part 10a is sent to the data input part 20 of the displacement detecting device 7 as an electric signal at any time via an electric cable. Is transmitted, and in the four rotational displacement measuring devices 26 of the measuring device main body 6,
As described above, the arms 9, 10 in each rotating unit 11
The relative angle C between them is transmitted as an electric signal to the data input section 20 of the displacement detecting device 7 via an electric cable at any time. At the time of the first detection, the main control unit 13 first receives the relative angle C in the data input unit 20 in which the above-described expansion / contraction amount B and relative angle C are transmitted as an electric signal, and the relative angle C is stored in the bus. It is transmitted to the second calculation unit 21 via the line 15. In addition, as described above, in the initial state, the ring body 6a has a substantially regular octagonal shape, and the relative angles C at all eight positions are 135 °.

Further, the main control unit 13 includes a data input unit 20.
And receives the amount of expansion / contraction B at the bus wire 15
To the first arithmetic unit 19 and simultaneously causes the first arithmetic unit 19 to perform a predetermined arithmetic operation. That is, the first calculation unit 19 calculates and obtains the lengths D of the four linear motion arms 10. That is, since the expansion / contraction amount B indicates each length of the linear motion parts 10a of the four linear motion arms 10, in each linear motion arm 10, the lengths of the linear motion parts 10a and the lengths other than the linear motion parts 10a are different. The respective lengths D of the four linear motion arms 10 are obtained by performing an addition operation with the height (a fixed value). Note that, as described above, in the initial state, the ring body 6a has a substantially regular octagonal shape, and therefore the length D of each of the four linear motion arms 10 is equal to that of each of the four fixed arms 9. It is substantially equal to the length E (constant value) (it should be noted that, due to the sectional shape of the shaft 3, in the initial state, the length D of the linear motion arm 10 is equal to the length E of the fixed arm 9
May not be equal to. ). Each length D of the linear motion arm 10 is transmitted as an electric signal to the main control unit 13 via the bus line 15 from the first calculation unit 19, and the length D is reported by the main control unit 13 to the second calculation unit 21. Be transmitted to. On the other hand, the relative angle C and the length D are transmitted to the second calculation unit 21 by the main control unit 13 as described above. Main controller 13
After transmitting the relative angle C and the length D to the second calculation unit 21, the shape of the ring body 6a of the measuring device body 6, that is, the relative distance between the four fixed arms 9 is transmitted to the second calculation unit 21. The scaled graphic data F indicating the position is created. That is, the lengths D of the four linear motion arms 10, the relative angles C between the arms 9 and 10, and the lengths E of the four fixed arms 9 stored in advance in the second calculation unit 21. Depending on (constant value), the ring body 6a
The reduced scale graphic data F of is created. In addition, as described above, in the initial state, the ring body 6a has a substantially regular octagonal shape, and therefore, the scaled graphic data F of the ring body 6a is data indicating a regular octagon.

The reduced scale graphic data F is reported from the second arithmetic unit 21 to the main control unit 13 via the bus line 15. The main control unit 13 transmits the reduced scale graphic data F to the display unit 17, 3 (a), the screen 17 of the display unit 17
The scaled graphic G based on the scaled graphic data F is displayed on a. The fixed arm 9 on the lower side of the drawing in FIG. 1 among the four fixed arms 9 of the ring body 6a is a fixed arm 9P, and the scaled graphic data F indicating the ring body 6a is
It is data indicating the relative positions of the fixed arms 9 with respect to the fixed arm 9P. Further, the scaled figure G (octagon) is a figure 9 ', 10' showing the fixed arm 9 and the linear movement arm 10 and a symbol "A1" showing each fixed arm 9,
It is displayed together with “A2”, “A3”, and “A4”, and the side H corresponding to the fixed arm 9P is displayed as a reference on the screen 17. However, when the fixed arm 9P is described by distinguishing it from the other three fixed arms 9, "fixed arm 9P"
When describing the fixed arm 9P without distinguishing it from the other three fixed arms 9, it is simply described as “fixed arm 9”. Further, as described above, the reduced scale graphic data F is transmitted to the display unit 17 by the main control unit 13 and also to the downhole displacement determination unit 22 by the main control unit 13 to the downhole displacement determination unit 22. Scaled graphic data F is stored.

As described above, the reduced scale graphic G (regular octagon) of the ring body 6a in the initial state is displayed on the display unit 17. After the reduced scale graphic G having the shape of the ring body 6a in the initial state is displayed on the display unit 17, the dangerous displacement amount J is subsequently set. That is, first, by recognizing the state of the initial state of the internal space 3b of the vertical shaft 3 via the scaled figure G, the state of the initial state of the internal space 3b, therefore, the inner wall 3a of the vertical shaft 3a.
However, when displaced from the initial state, the minimum value of the amount of displacement (distance) of the inner wall 3a in which the risk of collapse of the shaft 3 or the like is predicted (or a value in which a predetermined safety factor is taken into consideration). Therefore, the dangerous displacement amount J, which is the allowable value of the displacement amount of the fixed arm 9 fixed to the inner wall 3a, is predicted. Then, via the keyboard 16 of the displacement detection device 7, the main control unit 13 is instructed to start the setting operation of the dangerous displacement amount J, and the dangerous displacement amount J
Enter. The main control unit 13 receives the input dangerous displacement amount J
Is transmitted to the pit wall displacement determination unit 22, and the dangerous displacement amount J is stored in the pit wall displacement determination unit 22.

By excavating the shaft 3, the stress relationship due to earth pressure in the ground 2 surrounding the shaft 3 is different from that before the excavation. Therefore, in the ground 2, the stress relationship due to earth pressure is changed. At a location where the stress balance is lost, the ground 2 is displaced with the passage of time. Here, the displacement of the ground 2 is occurring with the passage of time now, and accordingly, the displacement of the internal space 3b of the vertical shaft 3 surrounded by the ground 2 is occurring. Therefore, while the predetermined time T1 has elapsed from the first detection, as shown by the chain double-dashed line in FIG. 1, of the ground 2 surrounding the shaft 3, the ground 2 on the upper side of the paper in FIG.
1 is displaced toward the lower side of the paper surface of FIG. 1, and therefore, the inner space 3b of the vertical shaft 3 is displaced such that the upper portion of the paper surface of FIG. 1 is dented downward in the paper surface of FIG. However, the four installation wedges 1 fixed in the displaced ground 2 are fixed.
One of the two installation wedges 12 on the upper side of the paper surface of FIG. 1 is fixed to the displaced ground 2, so that the direction of displacement, that is,
As shown by the chain double-dashed line in FIG. 1, it is displaced downward in the plane of the paper in FIG. 1, and the other three installation wedges 12 are in the initial state because the ground 2 to which they are fixed is not displaced. It remains in the state of not being displaced. Therefore, the ring body 6a
In the octagon, the linear motion arms 10 on both sides of the fixed arm 9 corresponding to the displaced installation wedges 12 are shortened and shortened, and a total of four rotary parts 11 on both sides of these two linear motion arms 10.
In, the arms 9 and 10 are deformed so that the angle formed by them changes from 135 °.

After a lapse of a predetermined time T1 from the first detection, therefore, in a state where the internal space 3b of the shaft 3 is displaced from the initial state, the main control section 13 of the displacement detecting device 7
Detects the state of the inner space 3b of the vertical shaft 3 in the second detection, that is, in the displaced state. That is, the main control unit 13 transmits the relative angle C received from the measuring device body 6 side in the data input unit 20 to the second computing unit 21, and the expansion / contraction amount B received from the measuring device body 6 side is the first computing unit. 19 is transmitted. Also,
The main controller 13 causes the first calculator 19 to perform the above-described predetermined calculation based on the expansion / contraction amount B to obtain the lengths D of the four linear motion arms 10. The main control unit 13 has a length D
Is transmitted from the first arithmetic unit 19 to the second arithmetic unit 21, and the second arithmetic unit 21 uses the transmitted length D, the already transmitted relative angle C, and the previously stored length E. The reduced scale graphic data F is created. The main control unit 13 transmits the scaled graphic data F from the second calculation unit 21 to the display unit 17, and displays the scaled graphic G on the screen 17a of the display unit 17. At the time of the second detection, as described above,
Since the octagon of the ring body 6a is deformed from the initial state, the portion of the ring body 6a that is deformed from the initial state, that is, the scale figure G corresponding to the portion indicated by the two-dot chain line in the upper part of FIG. The part, that is, the upper part (the part shown by the solid line) in FIG. 3B is displaced from the corresponding part of the scale figure G in the initial state, that is, the upper part in FIG. 3A. There is. Further, the reduced scale graphic G in the initial state is continuously displayed on the screen 17a after the second detection, and the reduced scale graphic G in the initial state is shown in FIG. 3B after the second detection. Is displayed with a broken line (the part where the scaled graphic G in the initial state and the scaled graphic G after the second detection overlap each other is displayed with a solid line). That is, by visually comparing the scaled graphic G in the initial state displayed by the broken line with the scaled graphic G obtained by the second detection, the ring body 6a can be easily deformed between the initial state and the second detection. It can be confirmed, therefore, the internal space 3b of the shaft 3
The displacement between the initial state and the time of the second detection can be easily confirmed.

On the other hand, the main controller 13 is, as described above,
The reduced scale graphic data F is transmitted from the second calculation unit 21 to the display unit 17, and the reduced scale graphic data F is transferred to the mine wall displacement determination unit 2.
It is also transmitted to 2, and the judgment of the pit wall displacement is made. That is, as described above, the downhole displacement determining unit 22 stores the scale figure data F and the dangerous displacement amount J in the initial state, but the downhole displacement determining unit 22 detects the second time. The displacement distance between the fixed arms 9 corresponding to each other between the scale figure data F and the scale figure data F in the initial state, that is, the displacement amount K is calculated, and each displacement amount K and the dangerous displacement amount J are calculated. Compare. In comparison, if at least one of the displacement amounts K has a dangerous displacement amount J or more, the downhole displacement determination unit 22 transmits a warning signal L to the main control unit 13 side, and the displacement amount K If all are less than the dangerous displacement amount J, the downhole displacement determination unit 22 does not transmit the warning signal L to the main control unit 13 side. At the time of the second detection, all of the displacement amount K is less than the dangerous displacement amount J, so the pit wall displacement determination unit 2
2 does not transmit the warning signal L to the main controller 13 side. Also,
The pit wall displacement determination unit 22 determines the displacement amount K regardless of whether the warning signal L is transmitted to the main control unit 13 side.
To the side. The displacement amount K is further transmitted to the display unit 17 by the main control unit 13, and as shown in FIG. 3B, a symbol A1 for identifying each fixed arm 9 on the screen 17a of the display unit 17 (the lower right part of the screen 17a). Displayed as a numerical value together with A4. Therefore, at the time of the second detection, as shown in FIG. 3B, the displacement amount K in the fixed arm 9 (upper surface of FIG. 1) displaced from the position in the initial state is larger than zero (that is, a numerical value). , A1 = 2.01) is displayed on the screen 17a and the displacement amount K in the other fixed arm 9 is displayed.
Is displayed as zero. The operator can easily and accurately confirm the degree of deformation of the ring body 6a by reading the numerical values of the respective displacement amounts K displayed on the screen 17a, and confirm the degree of deformation of the ring body 6a. Thus, the displacement of the inner space 3b of the vertical shaft 3 can be confirmed.

The fixed arm 9P (lower side of the plane of FIG. 1)
As described above, since the position of is the reference for creating the scaled figure data F, the scaled figure G and the displacement amount K are all relative displacements based on the position of the fixed arm 9P. It is shown. That is, the side H corresponding to the fixed arm 9P of the scaled figure G is always immobile, and the displacement amount K of the fixed arm 9P is always zero. Therefore, the displacement amount K in the fixed arm 9P is always the screen 17a.
Displayed as zero. (Therefore, in the excavation site 1, when it is considered that the ground 2 on the lower side of the paper in FIG. 1, that is, the ground 2 corresponding to the fixed arm 9P is displaced in one direction with respect to the other ground 2, The ground 2 other than the ground 2 corresponding to the fixed arm 9P is displaced in the opposite direction of the one direction, and is displayed in the scale figure G and the displacement amount K).

After the predetermined time T1 has elapsed again after the second detection is performed as described above, the main control unit 13 of the displacement detection device 7 performs the third detection and further the third detection. After a predetermined time T1 has elapsed from the detection of No. 1, the main control unit 13 of the displacement detection device 7 subsequently performs the fourth detection. In this way, the detection is performed the required number of times in the form of the third, fourth, fifth, ..., Nth detection (N is an integer) every predetermined time T1 from the second detection. . The third and subsequent detections are performed in the same manner as the second detection described above, as follows. That is, the main control unit 13 controls the data input unit 2
At 0, the relative angle C received from the measuring instrument body 6 side is transmitted to the second computing unit 21, and the expansion / contraction amount B received from the measuring instrument body 6 side is transmitted to the first computing unit 19. In addition, the main controller 1
3 causes the first calculation unit 19 to perform the above-described predetermined calculation based on the expansion / contraction amount B to obtain the lengths D of the four linear motion arms 10. The main controller 13 transmits the length D from the first calculator 19 to the second calculator 21, and the second calculator 21 transmits the length D and the already transmitted relative angle C and The reduced scale graphic data F is created with the length E stored in advance. The main control unit 13 transmits the reduced scale graphic data F from the second calculation unit 21 to the display unit 17, and displays the reduced scale graphic G on the screen 17a of the display unit 17 (note that the screen 17a displays the scaled graphic data G at the time of the previous detection). The displayed scale figure G is deleted, and only the scale figure G in the initial state indicated by the broken line and the newly displayed scale figure G are displayed.) In addition, the main control unit 13 uses the scale figure data F as the pit wall displacement determination unit 22.
It is also transmitted to and the judgment of the wall displacement is made. That is, when the displacement amount K is calculated and all the displacement amounts K are less than the dangerous displacement amount J, the downhole displacement determination unit 22 does not transmit the warning signal L to the main control unit 13 side, and the downhole displacement determination is performed. The unit 22 transmits the displacement amount K to the main control unit 13 side. The displacement amount K is further transmitted to the display unit 17 by the main control unit 13, and the screen 17a of the display unit 17 is displayed.
Is displayed as a numerical value in (indicated on the screen 17a, the displacement amount K displayed at the previous detection is erased, and only the newly displayed displacement amount K is displayed). As described above, the inner space displacement measuring device 5 detects each of the second and subsequent times, and the inner space 3b of the vertical shaft 3 in the displaced state is detected.
Numerical values of the scale figure G showing the above-mentioned aspect and the displacement amount K showing the displacement amount of the internal space 3b of the shaft 3 are displayed on the display unit 17. When the measurement of the displacement of the internal space 3b in the vertical shaft 3 is completed, the inner-air displacement measuring device 5 is removed from the vertical shaft 3 by removing the installation wedge 12 from the inner wall 3a of the vertical shaft 3, and then removed.

By the way, the above-mentioned first, second, third, ...
In the Nth detection, in the comparison of the displacement amount K and the dangerous displacement amount J at the time of determining the underground wall displacement in the underground wall displacement determination unit 22, all the displacement amounts K are less than the dangerous displacement amount J. Although only the case has been described, if at least one of the displacement amounts K has a dangerous displacement amount J or more, that is, if the danger of causing the collapse of the vertical shaft 3 is predicted, as described above. The pit wall displacement determination unit 22 sends a warning signal L to the main control unit 13 side.
To transmit. The main control unit 13 displays the warning signal L on the display unit 1.
7 and, as indicated by the broken line in FIG.
The character M indicating the danger is displayed on the screen 17a of 7 (the upper right part of the screen 17a). In addition, in response to the warning signal L, the main control unit 13 outputs a sound through a speaker 23 installed at a work place (not shown) located at the inner and lower ends of the vertical shaft 3 to a worker who is working in the work place. Notify the danger. That is, by using the inner-air displacement measuring device 5, the displacement of the inner space 3b of the vertical shaft 3 can be accurately and easily measured, and at the same time, the danger notice to the worker or the like can be issued based on the accurate measurement result. Since it is emitted promptly after the measurement, it is possible to enhance the safety of work in the vertical shaft 3 or the like.

As described above, the inner-air displacement measuring device 5 can be installed and fixed on the inner wall 3a of the shaft 3 at a predetermined angular pitch A.
It has four fixed arm 9 members provided with installation wedges 12, and a linear arm 10 is connected between the four fixed arms 9 so as to be rotatable relative to the fixed arms 9. It is provided. In addition, the linear motion arm 10 includes the linear motion arm 1
An expansion / contraction displacement measuring device 25 for measuring and outputting the expansion / contraction amount B of the linear motion part 10a of 0 is provided, and between the linear motion arm 10 and the fixed arm 9, a relative angle C between the arms 10, 9 is provided.
A rotational displacement measuring device 26 for measuring Further, based on the expansion / contraction amount B output from the expansion / contraction displacement measuring device 25 and the relative angle C output from the rotational displacement measuring device 26, the scaled graphic data F indicating the relative position between the four fixed arms 9 is displayed. Is provided with a first computing unit 19 and a second computing unit 21.
There is provided a display unit 17 for outputting the scaled graphic data F calculated and detected by 1 in the form of a scaled graphic G or a variation K. Therefore, the fixed arm 9 is attached to the inner wall 3a of the vertical shaft 3.
Since the fixed arm 9 is fixed to, the scaled graphic data F indicating the relative position between the fixed arms 9 changes in accordance with the displacement of the inner wall 3a of the vertical shaft 3. That is, since the scale figure data F changes in accordance with the displacement of the internal space 3b of the shaft 3, by recognizing the scale figure G or the scale figure data F output in the form of the change amount K or the like, The displacement of the inner space 3b of the vertical shaft 3 is accurately and easily recognized. That is, vertical shaft 3
The displacement of the internal space 3b can be accurately and easily measured.

In the above-mentioned embodiment, the ring body 6a is formed in an octagonal shape by the four fixed arms 9 and the linear motion arms 10, but the ring body 6a is not limited to the octagonal shape, and the same number is used. The fixed arm 9 and the linear motion arm 10 are alternately connected to each other to form a decagon, a dodecagon, a quadrangle,
......, may be formed in. By increasing the number of fixing arms 9 of the ring body 6a, the number of fixing points between the ring body 6a and the inner wall 3a of the vertical shaft 3 increases, so that the ring body 6a
Will be displaced more accurately in accordance with the displacement of the internal space 3b of the vertical shaft 3. In other words, the internal space 3 of the shaft 3
The displacement of b is measured even more accurately.

All of the ring bodies 6a described in the above embodiments have the same number of fixed arms 9 and linear motion arms 1.
0 are connected so as to form a continuous ring, but the ring body 6a includes a fixed arm 9 and a linear motion arm 10.
May be formed in a notched annular shape or the like as long as they are integrally connected. For example, in the ring body 6a shown in FIG. 1 formed in an octagonal shape by four fixed arms 9 and four linear motion arms 10, one linear motion arm 10 is omitted to form the ring body 6a. Good. Even if the ring body 6a is configured in the form in which one linear motion arm 10 is omitted, all the fixed arms 9 are connected and connected via the linear motion arm 10, and therefore, each linear motion arm 10 is connected. Based on the length D and the relative angle C between the fixed arm 9 and the linear movement arm 10, the relative position between the fixed arms 9 (that is, the reduced scale graphic data F) is accurately obtained.

As described above, the present invention is applicable to the vertical shaft 3
A plurality of fixed arms 9 which can be installed and fixed on a ground wall such as an inner wall 3a of a vertical shaft at a predetermined angle pitch such as a predetermined angle A.
And a fixing member such as an installation wedge 12, and an elastic member such as a linear motion arm 10 is connected between the plurality of fixing members so as to be rotatable relative to the fixing member. The expansion / contraction member is provided with expansion / contraction displacement measuring means such as an expansion / contraction displacement measuring device 25 for measuring and outputting the expansion / contraction amount such as expansion / contraction amount B of the expansion / contraction portion of the expansion / contraction member, and these are provided between the expansion / contraction member and the fixed member. An angle measuring means such as a rotational displacement measuring device 26 for measuring a relative angle such as a relative angle C between the elastic member and the fixed member is provided,
A first calculation unit 19 that calculates the relative position of the scaled figure data F or the like between the plurality of fixing members based on the expansion / contraction amount output from the expansion / contraction displacement measuring unit and the relative angle output from the angle measuring unit. Since a calculation unit such as the second calculation unit 21 is provided and an output unit such as the display unit 17 that outputs the relative position between the plurality of fixed members calculated and detected by the calculation unit is provided, the vertical shaft Since the relative position between the fixing members fixed to the mine shaft ground is displaced in response to the displacement of the mine shaft ground of the pit, and thus the displacement of the interior space of the pit, the output unit By recognizing the output relative positions of the fixing members, the displacement of the internal space of the shaft can be recognized accurately and easily. That is, the displacement of the inner space of the vertical shaft can be accurately and easily measured.

[Brief description of drawings]

FIG. 1 is a view showing a state in which an inner air displacement measuring device according to the present invention is installed in an example of a vertical shaft.

FIG. 2 is a diagram showing a displacement detection device of the inner-air displacement measuring device shown in FIG.

3 (a) and 3 (b) are diagrams showing screens of a display unit shown in FIG.

[Explanation of symbols] 3 ... Vertical shaft 3a ... Ground of underground wall (inner wall) 5 ... Inner-air displacement measuring device 9 ... Fixed member (fixed arm) 10 ... Telescopic member (direct acting arm) 12 ... Fixed Member (installation wedge) 17 ... Output unit (display unit) 19 ... Calculation unit (first calculation unit) 21 ... Calculation unit (second calculation unit) 25 ... Expansion / contraction displacement measuring means (expansion / contraction displacement measuring device) 26 …… Angle measuring means (rotational displacement measuring device) A …… Predetermined angle B …… Expansion and contraction amount C …… Relative angle F …… Relative position (scaled graphic data)

Claims (1)

[Claims] 1. A plurality of fixing members that can be installed and fixed at a predetermined angular pitch on a mine wall of a vertical shaft, and an elastic member is provided between the plurality of fixing members relative to the fixing member. Is provided so as to be pivotally connected to the expansion member, and the expansion member is provided with expansion displacement measuring means for measuring and outputting the expansion amount of the expansion member, and the expansion member and the fixing member are fixed between the expansion member and the fixing member. An angle measuring means for measuring a relative angle between the members is provided, and based on the expansion / contraction amount output from the expansion / contraction displacement measuring means and the relative angle output from the angle measuring means, a relative position between the plurality of fixing members. An inner-air displacement measuring instrument configured to include an arithmetic unit for arithmetically operating, and an output unit for outputting a relative position between the plurality of fixed members arithmetically detected by the arithmetic unit.